Test of Significance Quiz

Which test is commonly used for small sample mean comparisons?

• z-test

• t-test

• F-test

• χ²-test

What is the minimum sample size usually considered for a t-test?

• n > 30

• n < 30

• n = 50

• n = 10

Which test is used to compare variances of two populations?

• t-test

• F-test

• z-test

• χ²-test

Chi-square test is used to test:

• Means

• Proportions

• Frequencies

• Variances

In paired t-test, the data must be:

• From different populations

• Independent

• Matched pairs

• Normalized

Which of the following is an assumption of the t-test?

• Sample is large

• Population is skewed

• Population is normal

• Sample is biased

The degrees of freedom for a t-test with n samples is:

• n

• n+1

• n-1

• n-2

Which of the following tests is used for testing independence of attributes?

• t-test

• F-test

• Chi-square test

• Z-test

A chi-square test for goodness of fit compares:

• Observed vs Expected Frequencies

• Means

• Variances

• Medians

Which test is sensitive to small sample size and unknown population variance?

• t-test

• z-test

• Chi-square test

• None of these